Nj

Nj or NJ can stand for:

Nano joule (nJ), an SI unit of energy equal to 10^-9 joules
Nj (letter)
New Jersey (United States postal abbreviations)
Napierville Junction Railway (AAR reporting marks NJ)
Nordjyske Jernbaner, a Danish railway company
Narva-Jõesuu, Estonia
Neighbor-joining, a bioinformatic method for the construction of phylogenetic trees.

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